BISupply 30A L5-30 Outdoor Power Inlet Box - Gray Copper, Weatherproof with LED Indicator

The BISupply 30 Amp L5-30 outdoor power inlet box is a weatherproof, easy-to-install generator hookup with a green power indicator for safe, reliable temporary power connections.

When storm season, planned outages, or jobsite demands require a dependable external power connection, this compact inlet box provides a simple interface between a portable generator and your building’s transfer system or temporary power setup. Built from copper with a gray anti-corrosive powder coat and a watertight spring cover, the unit resists rust and protects the inlet when not in use. It’s sized for 125-volt L5-30P connections and designed to balance durability with straightforward installation for homeowners, contractors, and facility managers.

How does this inlet box make connecting a generator easier?

The BISupply inlet box organizes the connection point outdoors with a three-prong L5-30 receptacle and a visible green indicator light so you can confirm generator output at a glance. Its removable front and 3-inch wiring clearance simplify routing conductors during surface-mount installation.

• Built-in green LED to show when generator power is present
• Removable front panel lets you position wiring before final mounting
• 3 inches (7.6 cm) of space behind inlet for easier cable management
• Compact 4 x 4 x 6-inch footprint fits tight exterior locations

Is this inlet box weather-resistant enough for outdoor use?

This inlet box is constructed from copper and coated with a powder finish to guard against corrosion, while the spring-loaded cover keeps rain, snow, and debris away from the receptacle when it’s not in use. The materials and sealing approach are intended to extend service life in typical exterior conditions.

• Copper construction for reliable conductivity and durability
• Anti-corrosive gray powder-coating to resist rust and fading
• Watertight spring cover protects inlet from the elements
• Designed for outdoor mounting and seasonal exposure

What wiring and compatibility do I need to know before buying?

This inlet is configured for 125-volt, 30-amp L5-30P generator plugs and provides standard three-prong connections for common portable generators. The unit’s internal space and knockout/punch options let electricians and skilled DIYers route and secure conductors safely.

• Fits 3-prong L5-30P generator plugs (30A, 125VAC)
• 3-inch internal depth to accommodate wiring and connectors
• Punch-out stamped wire hole supports using a drill or knockout punch
• Includes installation instructions for straightforward setup

How does the indicator light improve safety and convenience?

The integrated green indicator illuminates when the generator is supplying power to the inlet, reducing guesswork during connection and helping you verify operation before engaging transfer equipment or loads. It’s a small feature that improves usability for quick checks.

• Instant visual confirmation of generator output
• Helps prevent accidental live connections during setup
• Useful for remote or poorly lit installation locations
• Low-maintenance LED design reduces replacement frequency

Who is this for? The BISupply 30 Amp inlet box is intended for homeowners preparing a standby generator hookup, contractors provisioning temporary site power, and facility staff who need a compact, weatherproof inlet with clear visual confirmation of generator output. It’s best suited to 125V L5-30 applications where a durable, easy-to-install outdoor connection is required. Note: follow local electrical codes and consult a qualified electrician for permanent installations. This product carries a one-year manufacturer’s warranty and includes installation instructions.